| Topic: |
Komuranon-E Enlarging Lenses |
|
Author/Copyright:
|
John Jovic
|
Komuranon enlarger or enlarging lenses were
made by Komura Lens MFG. LTD. The Komuranon-E line of
lenses included 3.5/50, 5.6/75, 5.6/90, 5.6/105, 5.6/135 and 5.6/150mm lenses
and preceded the Komuranon-S line of
enlarging lenses.
 |
|
This advertisement was
published in Australian Photography Photo Directory 1975[1] |
According to the advertising clipping
above 'All Komuranon lenses are multicoated.'
 |
|
This is a crop from the
above advertisement showing Komuranon-E enlarging lenses. |
The brochure below shows the
front and rear pages of the Besler Photo Marketing Co. brochure for the
Komuranon-E lenses. The exact date of the brochure is not know but
probably around the early to mid 1970's. Note that only the 50, 75 and
105mm lenses are shown. The brochure was kindly supplied by Chuckp from
the Analog Photography
Users Group forum (APUG).
|
 |
 |
| Two page pamphlet or sales
brochure published by Beseler Photo Marketing CO., INC (date
unknown) to advertise the Komuranon-E enlarging lenses[2] |
Specifications
The specifications from the above Beseler Photo Marketing brochure have
been transcribed to the table below. Where specifications are provided
from other sources
they are referenced accordingly.
| |
3.5/50mm "E"[2] |
5.6/75mm "E"[2] |
5.6/90mm
"E"[pc] |
5.6/105mm
"E"[2] |
5.6/135mm
"E"[3] |
5.6/150mm
"E"[3] |
| Focal Length (mm): |
50 |
75 |
90 |
105 |
135 |
150 |
| Maximum aperture (F): |
3.5 |
5.6 |
5.6 |
5.6 |
5.6 |
5.6 |
| Lens construction (elements - groups): |
6-4 |
6-4 |
|
6-4 |
|
|
| Angle of coverage: |
|
|
|
|
56° |
56° |
| Recommended negative size (mm): |
24 x 36 |
2.25"x2.25" |
|
2.25"x3.25" |
|
|
| Minimum aperture (F): |
22 |
22 |
22 |
22 |
22 |
22 |
| Designed magnification: |
|
|
|
|
|
|
| Useful magnification range: |
|
|
|
|
|
|
| Achromatized wavelength range (nm): |
|
|
|
|
|
|
| Distortion at basic magnification (%): |
|
|
|
|
|
|
| Focal length design value (mm): |
|
|
|
|
|
|
| Barrel outer diameter A (front) (mm): |
|
|
|
|
|
|
|
Flange mount thread size: |
Leica |
Leica |
Leica |
Leica |
Leica |
Leica |
|
Filter size (mm) |
None[pc] |
|
M40.5x0.5[pc] |
None[pc] |
|
|
| Barrel outer diameter B (rear) (mm): |
|
|
|
|
|
|
| flange focal length (mm): |
|
|
|
|
|
|
| Back focal length (mm): |
|
|
|
|
|
|
Distance from flange surface to the
second principal point (mm): |
|
|
|
|
|
|
| Principal point spacing (mm): |
|
|
|
|
|
|
| Total length (mm): |
|
|
|
|
|
|
| Weight (g): |
112 |
93 |
|
132 |
|
|
|
Coating: |
Quadra-Coated |
Quadra-Coated |
|
Quadra-Coated |
|
|
|
Example of a Komuranon-E enlarging
lens
All the Komuranon-E lenses are of the same basic construction, they
all look alike. The images below are of a typical Komuranon-E lens, in
this case a Komuranon-E 90mm F5.6.
 |
|
Komuranon-E 5.6/90 enlarging lens (photographed
with a Yashica 3.5/40 enlarging lens on a Canon 5D2) |
|
|
 |
|
Komuranon-E 5.6/90 enlarging lens shown with
aperture wide open (photographed
with a Yashica 3.5/40 enlarging lens on a Canon 5D2) |
|
|
 |
|
Komuranon-E 5.6/90 enlarging lens shown with
aperture stopped down two stops to F11 (photographed
with a Yashica 3.5/40 enlarging lens on a Canon 5D2) |
|
|
 |
|
Komuranon-E 5.6/90 enlarging lens (photographed
with a Yashica 3.5/40 enlarging lens on a Canon 5D2) |
|
|
 |
|
Komuranon-E 5.6/90
enlarging lens (photographed with a Yashica 3.5/40 enlarging lens on a Canon
5D2) |
|
References |
|
[1] |
Photape Pty.Ltd/Haldex Pty.Ltd, Lenses?Lenses?
(Sydney, The Globe Publishing Co. Pty.Ltd., 1975)
Photape Pty.Ltd/Haldex Pty.Ltd, "Lenses?Lenses?", Australian
Photography Photo Directory 1975, (1975): 20-21 |
|
[2] |
Beseler Photo Marketing CO., INC, Introducing
Komuranon E (U.S.A., Beseler Photo Marketing CO., INC, nd) |
|
[3] |
"Photographic Lenses", Australian Photography
Photo Directory 1975, (1975): 186 |
|
[pc] |
Photo Cornucopia. Measured or personally
observed by the Author. |
|
|
|